Here is a list of groups in Connecticut:

Connecticut Society of Ferroequinologists and Model Railway Engineers, Connecticut S Gaugers, Housatonic Model Railway Club, Mohegan – Pequot Model Railroad Club, New Haven & Derby Railroad Club, New Haven Society Of Model Engineers, Silk City Model Railroad Club, The Stamford Model Railroad Club, Torrington Area Model Railroaders, Valley HO Trak Model Railroad Club, Valley Ntrak of Connecticut.

For details on individual groups visit http://www.model-railroad-resources.com/modelrailroadclubs.html